解决glassfish 3 + eclipselink 2 下 is not a known entity type 错误

运行时一直报 is not a known entity type 错误，代码基本都是用netbeans自动生成的，

怎么就出问题了？？？？后来又写了一个一般的java控制台程序，同样的代码却能正常运行

对比一下感觉应该是跟web容器glassfish有关 

 于是开始了漫长的Google之路，终于被我找到了：

http://forum.springsource.org/showthread.php?t=48514 

The solution for Tomcat 5.5.x includes moving both the toplink-essentials.jar and persistence.jar to the ${TOMCAT.HOME}/common/lib (${TOMCAT.HOME}/lib for newer versions) directory. Everything worked perfect after that.

既然Tomcat可以这样解决，glassfish应该也差不多 

把eclipselink-2.0.2.jar 和 eclipselink-javax.persistence-2.0.jar

拷到\Program Files\glassfish-3.0.1\glassfish\lib目录下，

运行.......不出所料，问题解决了，呵呵